Ryuuhou no Fumoto ni Bokura wa Sundeimasu

A boy named Ernea lives near the Dragon’s Peak, where the Dragon tribe, flying dragons, and the Forest of Dragons are located. He was raised in the kingdom's capital, which had ties to dragons. Before turning fifteen and beginning his journey, he studied alongside classmates. One day, while gathering food in the Forest of Dragons, he met an ancient dragon and trained under it, despite his awkward efforts. He dreams of having multiple brides like a hero, though he finds some intimidating. As he grows with his companions, he becomes involved in a conflict between the Mazoku and the Dragon men.